import React, { Component } from 'react'
import { List } from "immutable";
// 数组类型
let arr = List([1, 2, 3])

let arr2 = arr.push(4)

console.log(arr, arr2) // 不会影响老的数据 arr

export default class App extends Component {
  render() {
    return (
      <div>04-list</div>
    )
  }
}
